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Unit 8 Climate Change

Unit 8 Climate Change. Key Concepts. Climate vs. Weather. What is weather ? Conditions of the atmosphere over a short period of time (e.g. day-to-day). Includes current temperature, rainfall, snow, wind, floods, etc. What is climate ?

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Unit 8 Climate Change

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  1. Unit 8 Climate Change Key Concepts

  2. Climate vs. Weather • What is weather? • Conditions of the atmosphere over a short period of time (e.g. day-to-day). • Includes current temperature, rainfall, snow, wind, floods, etc. • What is climate? • Patterns of the conditions of the atmosphere over long periods of time. • Summary of the average weather conditions expected in a given place. • Includes average precipitation, avg. seasonal temperatures, avg. humidity.

  3. Climate Change • Changes in the AVERAGES (temperature, precipitation, etc.) • Not simply specific weather events. • Global warming contributes to climate change • Increase in the average global temperature • Leads to changes in weather • Leads to changes in long-term climate patterns

  4. Greenhouse Effect (GHE): What is it? • GHE is a natural process • Carbon dioxide, methane, water vapor, and other gases trap heat energy and maintain earth’s temperature range. • Without the GHE we could not have life on Earth!

  5. Greenhouse Effect (GHE): How do GH gases enter the atmosphere? • Carbon dioxide (CO2) naturally enters the atmosphere through cellular respiration, wildfires, and volcanic eruptions. • CO2 enters the atmosphere from human activity at MUCH HIGHER RATES: • Burning fossil fuels (gas, oil, coal) • For energy, heating homes, driving, etc. • By-product of industry and manufacturing – we make A LOT of stuff, and emit A LOT of CO2

  6. Greenhouse Effect (GHE): Linked to climate change More CO2 = more heat tramped in atmosphere Increase in average global temperatures Changes in weather patterns over time

  7. Signs of Climate Change • Higher global temperatures • More droughts • Changing rain and snow patterns • More extreme weather • Higher ocean temperature and acidity • Rising sea levels • Melting glaciers • Shrinking sea ice • Less snowpack • Thawing permafrost Your Projects!!

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